Designed and engineered for reliability and built with all the quality you expect from Taco, these Zone and Flow Control Valves are used to create and control individual zones or isolate equipment in a hydronic heating system. There are millions of Taco Zone Valves in use and they are the industry’s top choice for consistent performance. The category includes: Zone Sentry® Zone Valves, Heat Motor Zone Valves, the Flo Chek and Flow Switch.